/ Thesaurus / A Synonyms of agonic line Find synonyms for: Noun1. agonic line, lineusage: an imaginary line connecting points on the Earth's surface where the magnetic declination is zeroWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language